/* ============================================================
   FILE: 05-forms.css
   Sidebar Forms & Input Elements
   Premium dark styling for all form controls
   ============================================================ */

/* Form Wrapper */
.form-section {
  padding: var(--space-lg) var(--space-md);
  border-bottom: var(--glass-border);
}

.form-section:last-child {
  border-bottom: none;
}

/* Label Styles */
.form-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-sm);
}

.form-label.required::after {
  content: '*';
  color: var(--danger);
  margin-left: var(--space-xs);
}

/* Select Dropdown */
.select-custom {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  background-size: 20px;
  padding-right: 40px;
  transition: all var(--transition-fast);
}

.select-custom:hover {
  background-color: var(--bg-elevated);
  border-color: var(--border-active);
}

.select-custom:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  background-color: var(--bg-surface);
}

.select-custom:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Text Input */
.text-input,
.number-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  transition: all var(--transition-fast);
}

.text-input::placeholder,
.number-input::placeholder {
  color: var(--text-muted);
}

.text-input:hover,
.number-input:hover {
  background-color: var(--bg-elevated);
  border-color: var(--border-active);
}

.text-input:focus,
.number-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  background-color: var(--bg-surface);
}

.text-input:disabled,
.number-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Radio Group */
.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.radio-label {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  cursor: pointer;
  user-select: none;
  transition: all var(--transition-fast);
}

.radio-label:hover {
  color: var(--text-primary);
}

.radio-input {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-radius: 50%;
  background: var(--bg-surface);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  position: relative;
}

.radio-input:hover {
  border-color: var(--primary);
}

.radio-input:checked {
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 10px rgba(37, 99, 235, 0.4);
}

.radio-input:checked::after {
  content: '';
  position: absolute;
  width: 8px;
  height: 8px;
  background: white;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.radio-input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.radio-label-text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* Checkbox */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  cursor: pointer;
  user-select: none;
  transition: all var(--transition-fast);
  margin-bottom: var(--space-md);
}

.checkbox-label:hover {
  color: var(--text-primary);
}

.checkbox-input {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  position: relative;
}

.checkbox-input:hover {
  border-color: var(--primary);
  background: var(--bg-elevated);
}

.checkbox-input:checked {
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 10px rgba(37, 99, 235, 0.4);
}

.checkbox-input:checked::after {
  content: '✓';
  position: absolute;
  color: white;
  font-size: 14px;
  font-weight: 700;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.checkbox-input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.checkbox-label-text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* File Upload Zone */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  background: rgba(37, 99, 235, 0.02);
  position: relative;
}

.upload-zone:hover {
  border-color: var(--primary);
  background: rgba(37, 99, 235, 0.1);
  box-shadow: 0 0 20px rgba(37, 99, 235, 0.2);
}

.upload-zone.drag-over {
  border-color: var(--primary);
  background: rgba(37, 99, 235, 0.15);
  box-shadow: var(--shadow-glow-blue);
}

.upload-zone input[type='file'] {
  display: none;
}

.upload-zone__icon {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-md);
  opacity: 0.7;
  transition: all var(--transition-base);
}

.upload-zone:hover .upload-zone__icon {
  opacity: 1;
  transform: scale(1.1);
}

.upload-zone__label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  display: block;
  margin-bottom: var(--space-xs);
}

.upload-zone__subtext {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* File Chips */
.file-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: var(--space-xs) var(--space-md);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  margin: var(--space-xs);
  margin-top: var(--space-md);
  animation: slideUp var(--transition-base);
}

.file-chip__remove {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  background: transparent;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: var(--text-base);
  padding: 0;
  margin-left: var(--space-sm);
  transition: all var(--transition-fast);
}

.file-chip__remove:hover {
  background: rgba(239, 68, 68, 0.1);
  border-radius: 50%;
  transform: scale(1.1);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  user-select: none;
  font-family: var(--font-sans);
  position: relative;
  overflow: hidden;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Primary Button */
.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow-blue);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

/* Analyze Button (Full Width) */
.btn-analyze {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: var(--gradient-primary);
  color: white;
  font-size: var(--text-lg);
  font-weight: 700;
  margin-top: var(--space-lg);
  box-shadow: var(--shadow-md);
  position: relative;
}

.btn-analyze:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg), var(--shadow-glow-blue);
}

.btn-analyze:active:not(:disabled) {
  transform: translateY(-1px);
}

.btn-analyze.loading::after {
  content: '';
  position: absolute;
  right: var(--space-lg);
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Secondary Button */
.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-active);
}

/* Outline Button */
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover:not(:disabled) {
  background: rgba(37, 99, 235, 0.1);
  box-shadow: var(--shadow-glow-blue);
}

/* Danger Button */
.btn-danger {
  background: var(--gradient-danger);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-danger:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(239, 68, 68, 0.4);
}

/* Warning Button */
.btn-warning {
  background: var(--gradient-warning);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-warning:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(245, 158, 11, 0.4);
}

/* Success Button */
.btn-success {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-success:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow-green);
}

/* Small Button Variant */
.btn-small {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--text-xs);
}

/* Icon Button */
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* Ripple Effect */
.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.btn.ripple::before {
  animation: ripple var(--transition-base) ease-out;
}

/* Input with Icon */
.input-with-icon {
  position: relative;
  display: flex;
  align-items: center;
}

.input-with-icon input {
  width: 100%;
  padding-left: var(--space-lg);
}

.input-with-icon__icon {
  position: absolute;
  left: var(--space-md);
  color: var(--text-muted);
  pointer-events: none;
}

/* Form Row */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.form-row.single {
  grid-template-columns: 1fr;
}

/* Error Message */
.form-error {
  font-size: var(--text-xs);
  color: var(--danger);
  margin-top: var(--space-xs);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.form-error::before {
  content: '⚠';
  font-weight: 700;
}

/* Success Message */
.form-success {
  font-size: var(--text-xs);
  color: var(--secondary);
  margin-top: var(--space-xs);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.form-success::before {
  content: '✓';
  font-weight: 700;
}

/* Responsive Forms */
@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }

  .btn-analyze {
    font-size: var(--text-base);
    padding: var(--space-md) var(--space-lg);
  }

  .upload-zone {
    padding: var(--space-md);
  }

  .upload-zone__icon {
    font-size: var(--text-2xl);
  }
}